S355 is a medium-strength structural steel, and think the rail has 0.4–0.8% Carbon. The 70mm thick rail requires preheating to 250–300°C to
reduce thermal stresses and prevent hydrogen cracking. Post-weld heat treatment (PWHT) may also be needed depending on the rail grade.
E7018 (3.2mm or 4.0mm) is suitable as the first choice. Alternatively, consider E8018-C1 for better toughness and it has better compatibility
compared to E 7018 due to its Nickel addition .
C Sridhar.
On Tue, 10 Jun 2025 at 20:57, sriram Srinivasan <mail2ram40@gmail.com> wrote:
--Hi gentlemanWhat is electrode need to use welding EN100025 S355 and rail 71 mnPlease guide me
Sriram Srinivasan
https://materials-welding.blogspot.com/
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